Abrasive control unit



ABRASIVE CONTROL UNIT Filed Dec. 12, 1940 2 Sheets-Sheet l INVENT OR.

L/o aL; Hobson BY I 2 as ATToRNgv Oct. 13, 1942. L. L. HOBSON 7 2,298,564

' ABRASIVE CONTROL UNIT Filed 1380.. 12, 1940 2 Shets-Sheet 2 INVENTOR.

- BY ig a" Hobson 5 ms A Ti bn N'EY Patented Oct. 13, 1942 ABRASIVE CONTROL UNIT Lloyd L. Hobson, Marshall, Mich., assignor of one-half to Harry S. Toy, Detroit, Mich.

Application December 12, 1940, Serial No. 369,861

6 Claims.

My invention pertains to material dispersing apparatus and more particularly to abrasive distributing devices.

It is an object of my invention to provide an improved centrifugal material distributing apparatus.

It is also an object of my invention to provide improved rotary material distributing devices of simple, durable construction comprising means controlled for restricting the flow of material from the apparatus during predetermined portions of the circle of rotation of the apparatus.

It is a further object of my invention to provide rotary material distributing apparatus comprising, a rotatable material distributing housing which .is hollow and has material distributing apertures opening outwardly for distributing material from the central portion of the housing as it rotates, and also having an aperture closing member adjacent each aperture for closing and opening the apertures as the housing rotates, and control means for controlling the opening and closing of each aperture during predetermined portions of the circle of rotation.

Further object and advantages are within the scope of my invention, such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economies of manufacture and numerous other features as will be apparent from a consideration of the specification in conjunction with the drawings disclosing a specific embodiment of my invention, similar reference characters being applied to corresponding elements throughout, and in which:

Fig. 1 is a sectional view taken axially along the axis of rotation and showing rotary distributing apparatus arranged in accordance with my invention;

Fig. 2 is an enlarged sectional view on line 22 thereof; and

Fig. 3 is an enlarged view, being a cross section through the central portion of one of the slot closing members 45.

Referring more particularly to the figures of the drawings, I have illustratively disclosed a preferred embodiment of my improved material dispersing apparatus comprising a drive shaft II which is journalled for rotation on a horizontal 5 axis in suitable bearing I3, rising from a support I4, located on the floor I5 and it may be driven by an electric motor or other motive means in any suitable manner. The other end of the drive shaft. II

extends from the bearing and has mounted thereon for support and rotation a hol low material distributing housing I6 comprising an end wall I6 and a cylindrical portion I1, the end wall being therein secured in any suitable manner as by tack welding. The housing I6 has spaced abrasive guides I8 of a substantially triangular cross section, see Fig. 2, secured therein, as by means of screws I8, as shown, or any other suitable means. The cylindrical portion I! of said housing I6 has material distributing apertures I9 opening outwardly for delivering material by centrifugal force from the inside as the housing rotates. The material dispersing apertures I9 may take the form of axially elongated slots spaced apart circumferentially in the side walls thereof, said slots being located at the points between the guides I8. The apex of each guide I8 is turned inwardly and is provided with retaining bars 2| extending across from each apexto each adjacent apex where these may be secured, as by welding, to prevent the slot closing members from falling inwardly when the device is stationary. At one end the housing I6 is open for receiving material from any source of supply. The closed end or wall I6 of the housing is secured to the end of the shaft II, as by a screw 25 extending into a threaded aperture therein. If desired, the end Wall I6 of the housing may be securely interlocked to rotate with the shaft II as by suitable interlocking parts (not shown) provided on these two elements for interconnection therebetween, but this is not necessary where the apparatus is utilized for light work.

On the end of the shaft II adjacent the material distributing housing a collar2'l is secured, as by a set screw or key 28, and carries an attaching flange 29 projecting laterally to a substantially greater diameter than the housing.

One form of a device in which my dispersing apparatus may be used will now be described. A circular side wall plate 3| may be provided which fits snugly over the peripheral surface of the walls, as by welding, are aplurality of spaced partitions 31 which extend radially, one from between each slot I9 in the material dispersing housing and in this manner a radial dispersing passage 39 is formed, open from each slot. Material or abrasive to be dispersed is fed into the open end of the housing as by a conduit 4| leadripheral portion H of the housing I6 as it rotates,

a slot closing member 45 is provided adjacent each slot. As shown, each slot closing member 45 is an axially elongated bar of generally triangular cross-section of a suitable width for closing the adjacent aperture: or slot. i In opera-; 10

tion centrifugal force throws the bars 45 outwardly and the retainer bars 2| hold these where the housing is not rotating.

Control means is provided for controllin-gl'the r I claim:

1. In combination in a material distributing device, a hollow material distributing housing having apertures opening outwardly for delivering material by centrifugal force, said distributing housing bein open at one end for receiving material to be distributed and closed at the other end for mounting, a rotatively journalled driving shaft, attaching means for securing the closed end of said distributing housingrto one end of said shaft to be thereby supported and rotated, aper- (ture closing members disposed in said housing adjacent the respective apertures for movement .Z;.=.outwardly,.;by, centrifugal force to close the reopening and closing of each slot during predeenldspective adjacent ape es s t e hous 0- termined portions of its circle of rotationioomw ia 00 101 m mounted n a housing prising a rotatively journalled tr l m mb 41 eccentrically with reference to the axis of rotafrom which a flexible member 49,:suhzasa chain; .tion ofl'said housing, a d a flexible o e t e connects to each slot closing member. The outer eirc h aperture l si mber t end of the outer link of each piece of chain49 ecc c'con ol member. is pivotally connected to the:center.ofrone.of;the: 2. Amaterial dispersingdevice havinginncom-z slot closingrbans'45- in; -a,ny suitabl rmannerpasi lgbination, a rotatable distributing; housing; said by insertion into :a shallow-slot 50 :wheretit .is s: housing bei hOIIOW a having material dlspivotallymonnectedzbyx ati'pivotzlpiri 5lz;secured= :t i tin apert res for liv r n materi l from thereacross, as :by:,we lding,.tothewbar; aAithough-rza e center f the hous twar y as the housthe fiexibler connector member ;49.;is-shown:as .a; 'i o s, an a ally tend aperture closin large chain for clearness,-a small chain ofigreater r m er.disposed adja t each-ape ture to move r. flexibility is, preferably utilized'in actual practice: outwardly by ce ug l force fo Closing a d The chains/49,. not under. t;ension;:haveizbeen zopeningthe apertures as the distributinghousing Y brokenrawayhand representedxas tdottedrlinesi 1501130: s-a: o o e e bea i g means rota moreclearly; indicate. this conditionzifiIhe ro- ":i v y icurnalling id n rolzmemberin'the tatableficontrol' member-41 :may consistxof: two housin ..eccentrically with referenceto the axis: rings 53-and 55havingarpluralityrof.pivot-pins 1110f rotationofrthe housingysaid bearinglmeans' 51 extending therebetween'" in circumferentially' a i e f -v ryi he irec ion". of the: :1 spacedrelationj: The inner-end of thezinnerzlink -s.ec e i y Off-he Centrol member, d fl ble of eaclnof' the, pieces ofrchain :49. is pivotally*re-- control means connecting between each aperture: ceivedon-one;oj-thepins-5;1;: The controlmeme: ..closing;:,member. and :the control member: for her 4]- is:rotatahlyzjournalledjzrthe-housingaipom 'cop ningzand; closing each aperture. during respec-;; an oilrset eccentric-5% ot'ja shaft 5|; which g'exa; vtive portions, ofgthe circle 1oflrotation: of the dis; a. tends out ;of;the; open end ofpthefhousingmassing gtribllliing housin -5.1. throughrthe side wall oftherconduitzflrto a suit-1.; 3. A :material distributing devic having in able bracket 63 in-whichtitds firmly-:secured as 5:. ;--combination; .a-rmaterial distributing housing of by a clamp platejfii secured by=bolts;6.l. i a generallyrhollow conformation having-axially By loosening thenuts onthe clamping bolts.61,.. extending slots openin wa y for delivering the shaftfiitmaybe manually.irotated,.nas-rb 45,,material hy;,centrifuga1eforcena rotatively joursuitable'wrench, and in this mannerrthevdirection; nalled -shaft' Supp ti g and driving said distribor position;ofceccentricity ofzetheiofi-setfend 59 tingrhousinmslot os ng e bers d sposed in 'j may beiconvenientlybadjustednas de ired; J1me said housingndjacent vthe respective slots for l thsofi theichainatsland the; eccentricityeare -1=m v mentoutwar lybylcentriiu l force to close preferably so selectedand the direction of eatenthe espective: adjacent .slots as the housingd'otricity may begoadjustedzthat alltherslot closing tes,:a-con rormem rm un e in said hou n bars ;;exceptizthe. upper :one, are permitted to eccentrically withzreference to the axis of-rotamove to slot closing-positionrbyvcentrifugallace: e tion of;:.said ;housing,:and a flexible. connector tion as-the housing-rotates; The upper slot 0105-; extendingyfrom' each slot closing member to the a ing bar-145'is pulled away from; theslot. [9 by the: eccentric controlmember; chain to:permit::materialzto;be. thrown through 4. In combinationin a material dispersing'det pp sl as shuwnin-Figsrhand 2: vice, a'hollowsrmaterialdistributinghousinghav-i Also it is to.be;.understoodr;that:the various-1:; g slot-szopeninalou w rd y-f r operating.characteristicsuofzmy'improvedimate al byzicentrifugal' orc said dist house! e rial distributing:device-amay be utilized by:select. ing being open at one end for receiving material ing flexible connectors 4920i wariousalengths av to beedi'stri-buted, and closed at the other-end for-i shaft5l havingsae difierentreccentricityithan; mounting, a rotatively journalled drivingrshaft; shownand the; like..-

apparatus, as shown-, attaching. means: for securingthe closed-end of, a is represented :Withthe partxinthe operative po-: 1 said distributing housing to oneend ofesaid shaft sitions' assumed Wi h$118;disfil'iblltingihollsingirlii- (35 :to be thereby supported and rotated,:ean' axially I rotatingiand theslot; closing-members firthr'owm extending slot closing member disposediadjacent; outwardly byrc t fuga-l force: It is obviouszthata h each slot tomoveoutwardly by centrifugal-force.- the device may :be: operated irreitherzsdirectionsof for closing and opening'theslots.asrtheidistribut sv r tation, ing housinga'otates, acontrolmember;-bearing; It is apparent: that "within thGtSCOPEaDfLthEiH-J .meansrotativelyjournalling said controlrmember om'wmodificatinnsrand different; arrange in the. housingneccentrically with referencevtd ments may be ;made:.other.thanzhereinzdisclosed the axis of; rotation of the housing, said bearing-a and thepresentrdisclosnre risrillustrative zmerely means.ibeingadjustablezfor; varying: the direction-::

:Of theeccentricityezofixthe control ;memher,:..and flexibleicontrol :means connecting between each::-;;.:-.

the inventioni icomprehendingi all variationsa thereon-:1 I: V

slot closing member and the control member for opening and closing each slot during respective portions of the circle of rotation of the distributing housing.

5. A material distributing device having in combination, a rotatable distributing housing, said housing being hollow and having material distributing apertures for delivering material from the center of the housing outwardly as the housing rotates, aperture closing members disposed in said housing adjacent the respective apertures for movement outwardly by centrifugal force to close the respective adjacent apertures as the housing rotates, a control member mounted in said housing eccentrically with reference to the axis of rotation of said housing, and a flexible connector extending from each aperture closing member to the eccentric control member.

6. A material distributing device having in combination, a material distributing housing of a generally hollow conformation having axially extending slots opening outwardly for delivering material by centrifugal force, a rotatively journalled shaft for supporting and driving said distributing housing, an axially extending slot closing member disposed adjacent each slot to move outwardly by centrifugal force for closing and opening the slots as the distributing housing rotates, a control member, bearing means rotatively journalling said control member in the housing eccentrically with reference to the axis of rotation of the housing, said bearing means being adjustable for varying the direction of eccentricity of the control member, and flexible control means connecting between each slot closing member and the control member for opening and closing each slot during respective portions of the circle of rotation of the distributing housing.

LLOYD L. HOBSON. 

